# Pixhawk Baseboard v2 Ports {% hint style="warning" %} The ports and pinout of the Pixhawk Baseboard v2A and v2B are identical. The only difference is the orientation of the header pins. {% endhint %}

Pixhawk Standard Baseboard V2A

Pixhawk Standard Baseboard V2B

{% hint style="info" %} * Refer to diagram below for location of pin1. All connectors are JST GH 1.25 mm Pitch unless noted otherwise. * ```
``` {% endhint %} The Pixhawk Baseboard v1 has been replaced by the v2A & V2B. See the [**Baseboard Changelog**](https://docs.holybro.com/autopilot/pixhawk-baseboards/baseboard-changelog) for difference. ### **Power1 (Main) & Power2 Port (Backup)** (2.00mm Pitch CLIK-Mate) | **Pin** | **Signal** | **Volt** | | -------- | --------------- | -------- | | 1(red) | VDD5V\_BRICK1/2 | +5V | | 2(black) | VDD5V\_BRICK1/2 | +5V | | 3(black) | SCL1/2 | +3.3V | | 4(black) | SDA1/2 | +3.3V | | 5(black) | GND | GND | | 6(black) | GND | GND | ### **Telem1, Telem2, Telem3 ports** | **Pin** | **Signal** | **Volt** | | -------- | -------------- | -------- | | 1(red) | VCC | +5V | | 2(black) | TX7/5/2 (out) | +3.3V | | 3(black) | RX7/5/2 (in) | +3.3V | | 4(black) | CTS7/5/2 (in) | +3.3V | | 5(black) | RTS7/5/2 (out) | +3.3V | | 6(black) | GND | GND | ### **GPS 1 Port** | **Pin** | **Signal** | **Volt** | | --------- | ------------------- | -------- | | 1(red) | VCC | +5V | | 2 black) | TX1(out) | +3.3V | | 3(black) | RX1(in) | +3.3V | | 4(black) | SCL1 | +3.3V | | 5(black) | SDA1 | +3.3V | | 6(black) | SAFETY\_SWITCH | +3.3V | | 7(black) | SAFETY\_SWITCH\_LED | +3.3V | | 8(black) | VDD\_3V3 | +3.3V | | 9(black) | BUZZER- | 0\~5V | | 10(black) | GND | GND | ### **GPS 2 Port** | **Pin** | **Signal** | **Volt** | | -------- | ---------- | -------- | | 1(red) | VCC | +5V | | 2 black) | TX8(out) | +3.3V | | 3(black) | RX8(in) | +3.3V | | 4(black) | SCL2 | +3.3V | | 5(black) | SDA2 | +3.3V | | 6(black) | GND | GND | ### **CAN1, CAN2 ports** | **Pin** | **Signal** | **Volt** | | -------- | ---------- | -------- | | 1(red) | VCC | +5V | | 2(black) | CANH1/2 | +3.3V | | 3(black) | CANL1/2 | +3.3V | | 4(black) | GND | GND | ### **Uart4 & I2C port** | **Pin** | **Signal** | **Volt** | | -------- | ---------- | -------- | | 1(red) | VCC | +5V | | 2(black) | TX4(out) | +3.3V | | 3(black) | RX4(in) | +3.3V | | 4(black) | SCL3 | +3.3V | | 5(black) | SDA3 | +3.3V | | 6(black) | NFC\_GPIO | +3.3V | | 7(black) | GND | GND | ### **SPI Port** | **Pin** | **Signal** | **Volt** | | --------- | ------------ | -------- | | 1(red) | VCC | +5V | | 2 (black) | SPI6\_SCK | +3.3V | | 3(black) | SPI6\_MISO | +3.3V | | 4(black) | SPI6\_MOSI | +3.3V | | 5(black) | SPI6\_CS1 | +3.3V | | 6(black) | SPI6\_CS2 | +3.3V | | 7(black) | SPIX\_SYNC | +3.3V | | 8(black) | SPI6\_DRDY1 | +3.3V | | 9(black) | SPI6\_DRDY2 | +3.3V | | 10(black) | SPI6\_nRESET | +3.3V | | 11(black) | GND | GND | ### **USB Port** | **Pin** | **Signal** | **Volt** | | -------- | ---------- | -------- | | 1(red) | VBUS | +5V | | 2(black) | DM | +3.3V | | 3(black) | DP | +3.3V | | 4(black) | GND | GND | ### **I2C Port** | **Pin** | **Signal** | **Volt** | | -------- | ---------- | -------- | | 1(red) | VCC | +5V | | 2(black) | SCL3 | +3.3V | | 3(black) | SDA3 | +3.3V | | 4(black) | GND | GND | ### **ETH Port** | **Pin** | **Signal** | **Volt** | | -------- | ---------- | -------- | | 1(red) | RXN | +3.3V | | 2(black) | RXP | +3.3V | | 3(black) | TXN | +3.3V | | 4(black) | TXP | +3.3V | ### **AD\&IO Port** | **Pin** | **Signal** | **Volt** | | -------- | --------------- | -------- | | 1(red) | VCC | +5V | | 2(black) | FMU\_CAP1 | +3.3V | | 3(black) | FMU\_BOOTLOADER | +3.3V | | 4(black) | FMU\_RST\_REQ | +3.3V | | 5(black) | NARMED | +3.3V | | 6(black) | ADC1\_3V3 | +3.3V | | 7(black) | ADC1\_6V6 | +6.6V | | 8(black) | GND | GND | ### **AUX & RSSI** | | | | | - | ------------------ | ----- | | 1 | 5V | +5V | | 2 | FMU\_CH7 (AUX7) | +3.3V | | 3 | FMU\_CH8 (AUX8) | +3.3V | | 4 | GND | GND | | 5 | SBUS\_OUT/RSSI\_IN | +3.3V | | 6 | GND | GND | ### **RC IN Port** | **Pin** | **Signal** | **Volt** | | ------- | ------------ | -------- | | S | SBUS/PPM in | +3.3V | | + | VDD\_5V \_RC | +5V | | - | GND | GND | ### **DSM RC Port** (JST-ZH 1.5mm Pitch) | **Pin** | **Signal** | **Volt** | | --------- | ------------------ | -------- | | 1(yellow) | VDD\_3V3\_SPEKTRUM | +3.3V | | 2(black) | GND | GND | | 3(gray) | DSM/SPEKTRUM IN | +3.3V | ### **IO Debug Port** (JST-SH 1mm Pitch) | **Pin** | **Signal** | **Volt** | | --------- | ---------------- | -------- | | 1(red) | IO\_VDD\_3V3 | +3.3V | | 2 black) | IO\_USART1\_TX | +3.3V | | 3(black) | NC | -- | | 4(black) | IO\_SWD\_IO | +3.3V | | 5(black) | IO\_SWD\_CK | +3.3V | | 6(black) | IO\_SWO | +3.3V | | 7(black) | IO\_SPARE\_GPIO1 | +3.3V | | 8(black) | IO\_SPARE\_GPIO2 | +3.3V | | 9(black) | IO\_nRST | +3.3V | | 10(black) | GND | GND | ### **FMU Debug Port** (JST-SH 1mm Pitch) | **Pin** | **Signal** | **Volt** | | --------- | -------------------- | -------- | | 1(red) | FMU\_VDD\_3V3 | +3.3V | | 2 black) | FMU\_USART3\_TX | +3.3V | | 3(black) | FMU\_USART3\_RX | +3.3V | | 4(black) | FMU\_SWD\_IO | +3.3V | | 5(black) | FMU\_SWD\_CK | +3.3V | | 6(black) | SPI6\_SCK\_EXTERNAL1 | +3.3V | | 7(black) | NFC\_GPIO | +3.3V | | 8(black) | PH11 | +3.3V | | 9(black) | FMU\_nRST | +3.3V | | 10(black) | GND | GND | {% hint style="info" %} Please Note: * MAIN OUT is also known as I/O PWM OUT * AUX OUT is also known as FMU PWM OUT {% endhint %} ### **FMU PWM OUT (AUX OUT)** {% hint style="warning" %} The PWM Signal output of Main & AUX can be change to 5V via a change of a resistor. {% endhint %} | **Pin** | **Signal** | **Volt** | | ------- | ----------- | -------- | | S | FMU\_CH1\~6 | +3.3V | | + | VDD\_SERVO | 0\~36V | | - | GND | GND | ### **I/O PWM OUT (MAIN OUT)** | **Pin** | **Signal** | **Volt** | | ------- | ---------- | -------- | | S | IO\_CH1\~8 | +3.3V | | + | VDD\_SERVO | 0\~36V | | - | GND | GND | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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